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daca 2a+3b/4b+15a=0,(3), afla a/b

Răspuns :

2a+3b /4b+15a=0,(3)=3/9=1/3
(2a+3b)*3=(4b+15a)*1
6a+9b=4b+15a
15a-6a=9b-4b
9a=5b⇒ a/b=5/9